21.5 A Fully Integrated Multi-Phase Voltage Regulator with Enhanced Light-Load-Efficiency Peak of 86%, Featuring an Autonomous Mode Transition from Hard-Switching to Soft-Switching to Discontinuous Conduction Mode in 3nm FinFET CMOS. - Kishan Joshi; Avinash Shreepathi Bhat; Christopher Schaef; Keng Chen; Edward Lee; Yura Kocharyan; Ajay Janardanan; Dinesh Ganta; Huanhuan Zhang; Maximilian Geppert; Prescott McLaughlin; Arvind Raghavan; et al. (ISSCC, 2025)